Characterization of Baby Summers is a key element. You need to give her depth and make her relatable. The conflict in the story is also vital. It could be an internal conflict within Baby Summers, like a fear she has to overcome, or an external conflict, like a problem with a bully or a difficult situation at school. Additionally, the pacing of the story matters. You don't want it to be too slow or too rushed, so plan out how the events will unfold over time.
You can start by getting to know the character of Baby Summers. Read any existing material related to this character if there is some. Then, think about the setting you want for your fanfiction. It could be a modern-day suburb or a magical land.
The Summers girls themselves are an important element. Their individual characters, dreams, and fears would play a role in how they transform. For instance, if one of the girls is very brave, her transformation might be different from a more timid girl. Their relationships with each other would also matter. They could support or hinder each other's transformation.
Since I'm not entirely sure what 'an imprijt' means in this context, it's hard to define the key elements precisely. But generally in a baby - related fanfiction, elements like the baby's character (cute, mischievous etc.), the relationship between the main characters and the baby, and how the baby impacts the story's plot could be important.
Maybe the story could focus on the daily challenges of raising a baby in a different world or time period. If it's a fantasy setting, they might have to deal with magical creatures while taking care of the baby. They could have to find special food for the baby that only grows in enchanted forests.
One key element is the relationship dynamic. Dean is often portrayed as the protector of baby Castiel. For example, in many stories, Dean will go to great lengths to keep Castiel safe from harm.
Love and family are key elements. It's about Loki and Natasha coming together to form a family unit around their baby. Their love for each other and for their child is central.
One key element is the contrast between Sakura's innocence as a baby or young character and the often dark and mysterious nature of the Akatsuki. It creates an interesting dynamic.
One key element is the relationship between Arcee and Jack. It's often about how they interact, like how Arcee protects Jack while Jack offers her a different view of the world. Another element is the action. Since they are in the Transformers world, there are usually battles against Decepticons. For example, in many fanfictions, Jack might be in a dangerous situation and Arcee has to rescue him.
Love and family are key elements. The love between Kaz and Inej is central, and their new family dynamic with a baby is explored. Their individual growth as they become parents is also important.
Family and friends' support is another crucial part. In the fanfiction, we often see how their friends like Jace and Clary help them out, whether it's babysitting or just giving advice. This shows the importance of community within the Shadowhunter world when it comes to raising a baby.